as fran mentioned there are some elements of intelligence that are guesswork, conjecture, educated guesswork to be sure, but still, they're conjecture. it's not like a court of law where you say this is the evidence, this is irrefutable proof. on the other hand there are certain things that the intelligence community can do. for example, they can assess how stockpiles were accumulated in a particular country. you mentioned that the russians had supplied some chemical agents to the syrians and that's absolutely true. you can assess how each area supplies the syrians. you know what they've done, how they've done it and how often they do it. also you can have some intelligence sometimes from human sources that specifically outlines exactly, you know, how good the chemical weapons are, whether they'll be used, whether there's good training for it, what kind of training these people have and all of that is weighed in when they make their assessment. >> there are reports that the assad regime has loaded the chemical weapons onto missiles. you need to get between assad and the person that pushes th